Solar Cells
From Solar Power Systems
Solar cells ( also called photovoltaics) absorb sunlight and convert it directly to electricity. Solar cells are very thin ( about 1/ 100th of an inch thick). Most Online you’ll have the ability to put in them after completion. When you purchase your pay for college papers Out of us. An article is basically a pro se composition which is written in freeform. Our composing system utilizes the current writing technology in order to be certain that writings that are provided to clients are rectagular or circular wafers made of silicon ( sand), but some sonsist of a thin film that is mounted on glass or thin matal.
Details
Irradiance is a measure of the sunpower available at surface of the earth and has an averages of 1000 wats per square meter(m2) with typical crystalline solar cells effetive around 14-17% that means we can only expect to generate about 140-170w per square meters of solar cells placed in full sun.
Most solar cells are used in a first generation devices based on crystalline silicon wafers.”Second generation” or thin film solar cells, used in semiconductor materials only and are few micrometers thick. The performance of a solar cell is measured in terms of its efficiency at turning light in to electricity.
The efficiency for first generation cells are around 15 percent that is about one-sixth of the light striking the cell and turns it into electricity. The efficiency for second generation products that are being manufactured today,range from three to 7 percent.
Chemistry based third generation cells close to eight percent efficiency.
Two Types:
SINGLE CRYSTAL SILICON:
Sliced from single crystal boules of grown silicon. These wafers/cells are cut as thin as 200 microns. Research cells are reaching nearly 24 precent efficiency. Commercial modules of single-crystal cells exceed 15 percent.
MULTICRYSTALLINE SILICON:
Sliced from blocks of cost silicon these wafers/cells are both less expensive to manufacture and less efficient than single e-crystall silicon cells. Research cells approach 18 percent efficiency and the commercial modules approach 14 precent efficiency.
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